What is a logic element in FPGA?
In computing, a logic block or configurable logic block (CLB) is a fundamental building block of field-programmable gate array (FPGA) technology. Logic blocks require I/O pads (to interface with external signals), and routing channels (to interconnect logic blocks).
What is a logic cell in Xilinx FPGA?
Logic-cells A logic-cell is basically a small lookup table (“LUT”), a D flip-flop and a 2-to-1 mux (to bypass the flip-flop if desired). It has typically a few inputs (4 in the drawing above), so for example an AND gate with 3 inputs, whose result is then OR-ed with another input would fit in one 4-input LUT.
What is CLB FPGA?
A configurable logic block (CLB) is the basic repeating logic resource on an FPGA. When linked together by routing resources, the components in CLBs execute complex logic functions, implement memory functions, and synchronize code on the FPGA. A flip-flop is the smallest storage resource on the FPGA.
How does LUT work in FPGA?
The LUT in an FPGA holds a custom truth table, which is loaded when the chip is powered up. The LUT inputs act as the address lines for a corresponding one-bit-wide RAM cell. When an FPGA is configured, the bits of the LUT are loaded with ones or zeros based on what the desired truth table would be.
What are logic cells?
In MAX 3000 and MAX 7000 devices, a logic cell is a basic building block in a LAB that consists of five product terms and a configurable register, and can be configured individually for either sequential or combinational logic operation. This type of logic cell is also known as a macrocell.
Does Xilinx have fabs?
Xilinx pioneered fabless manufacturing and continues to deliver quality products. Xilinx pioneered fabless manufacturing and continues to deliver products with zero-defect using industry leading engineering with aligned supplier quality programs.
Which of the following are FPGA series from Xilinx?
Series overview
| Generation | Family | Internal operating voltage |
|---|---|---|
| Spartan-6 | Spartan-6 LXT | 1.0V or 1.2V |
| 7 Series | 0.9V, 0.95V, or 1.0V | |
| Spartan 7 | ||
| Artix-7 |
How many LUTs are in a CLB?
Every CLB contains one slice with eight 6-input LUTs and sixteen storage elements.
Can a Clb configured as RAM?
Configurable logic module In FPGA devices of Xilinx, CLB consists of multiple (generally 4 or 2) identical slices and additional logic. Each CLB module can not only be used to implement combinational logic and sequential logic, but also can be configured as distributed RAM and distributed ROM.
What are the basic logic elements?
All digital systems can be constructed by only three basic logic gates. These basic gates are called the AND gate, the OR gate, and the NOT gate. Some textbooks also include the NAND gate, the NOR gate and the EOR gate as the members of the family of basic logic gates.
What is slice in Xilinx FPGA?
Xilinx Slices (Virtex-4 and earlier) The elementary programmable logic block in Xilinx FPGAs is called slice. This architecture (with minor modifications) is used in all Virtex FPGA families before Virtex-5 and all Spartan FPGA families so far (at least, up to Spartan-3A).
What are the different types of Xilinx FPGAs?
Before 2010, Xilinx offered two main FPGA families: the high-performance Virtex series and the high-volume Spartan series, with a cheaper EasyPath option for ramping to volume production. The company also provides two CPLD lines: the CoolRunner and the 9500 series.
What is a Virtex-4 FPGA slice?
The elementary programmable logic block in Xilinx FPGAs is called slice. This architecture (with minor modifications) is used in all Virtex FPGA families before Virtex-5 and all Spartan FPGA families so far (at least, up to Spartan-3A). The Virtex-4 FPGA slice includes:
What is FPGA (field programmable gate array)?
FPGA (Field Programmable Gate Array) is an integrated circuit containing a matrix of user-programmable logic cells, being able to implement complex digital circuitry.